USB to RS232 TTL PL2303HX auto converter module adapter with a 5V output, which provides the most convenient way to connect your RS232 TTL devices to your computer via the USB port. The cable has a built-in TTL COM PC-PL2303HX Chip and uses a standard USB type A male and TTL 4 pin connector. The cable length is approximately 100cm in length.

Pinout:
Black - GND
Green - TXD
White - RXD
Red - VCC (5V)

WINDOWS 8/VISTA/10 USERS:

Please note the latest version of the Prolific drivers breaks comparability with versions of Windows from 8 and above. If you are using one of these versions of Windows do not use the driver provided through Windows update or download the driver from the Prolific website as these do not work. Instead please use the one available below and follow the installation guide provided.

Profilic_Win8_x64_x86.zip

[PLEASE LOGIN TO DOWNLOAD THE DRIVER]

To install the driver unzip the folder and right click the ser2pl.inf file and select 'install' from the context menu.

Next open up device manager and plug in the USB cable. Once installed you should see the cable appear as 'Prolific USB-to-Serial Comm Port (COMx)'.

In some cases Windows may automatically install the latest driver instead. If you see a yellow caution symbol beside the entry do the following steps to force windows to install the correct driver:

Right-click the entry in device manager and in the window that opens up select 'Update driver software'.

Click the second option (Browse my computer for software).

In the new windows that opens up select 'Let me pick from a list of device drivers on my computer'

Another window will open. In this windows select the driver version 3.3.2.102 dates 24/09/2008 and then click next.

This should now force the correct driver to install.

Older versions of Windows:

For older versions of Windows please use the latest version of the driver available from the Prolific website here:

I'm trying to do the update described here ( I have the warning yellow thingy on the com port (Prolific USB-to-Serial Comm Port (COM6))with an event:

If I try to update the driver I get to the folder (which I unzipped to my desktop). I can't open the folder to see files though. If I click next I get
Windows has determined that the best driver for this device is already installed....

Unfortunately the driver supplied by the Windows update process is broken. You'll need to completely remove all copies of this version before you can install the one provided in this forum. Yuo can do this by following these steps:

1) Plug the cable into your computer

2) Open up device manager and locate the cable in the list which should be listed as 'Prolific USB-to-Serial Comm Port (COMx)'.

3) Right-click on it and then select 'Uninstall device'

4) This next bit is important - make sure that the 'Delete the driver software for this device' check box is checked.

5) Click the uninstall button

6) Remove the cable and plug it back in.

7) If Windows attempts to reinstall the wrong driver again just repeat the above steps until it can no longer find a driver.

8) Next, right click it again and this time select 'Update driver'

9) In the window that opens up select 'Browse my computer for driver software'

10) In the new window that opens up click the browse button and then browse to wherever you unzipped the downloaded drivers.

11) Select the folder (note that sometimes there may be another folder inside your unzipped folder, if so then select that one - it needs to the actual folder that the .ini file is stored in). Then click the 'OK' button to install the driver.

If all goes well and the driver installs correctly there should no longer be a yellow triangle beside the device.

Comments made by this poster do not necessarily reflect the views of Hobby Components Ltd.